diff --git a/src/modules/dis.c b/src/modules/dis.c
index 18fbcd81..c0914716 100644
--- a/src/modules/dis.c
+++ b/src/modules/dis.c
@@ -57,6 +57,7 @@ static bool disassemble(CodeObject* co) {
 
             c11_sbuf__write_int(&ss, byte.arg);
             switch(byte.op) {
+                // TODO: see `dis.py` there is a memory issue
                 case OP_LOAD_CONST: {
                     py_Ref value = c11__at(py_TValue, &co->consts, byte.arg);
                     if(py_repr(value)) {
diff --git a/src/modules/linalg.c b/src/modules/linalg.c
index 63d36d5a..d582e158 100644
--- a/src/modules/linalg.c
+++ b/src/modules/linalg.c
@@ -305,7 +305,7 @@ DEF_VECTOR_OPS(3)
         c11_vec##D##i v = py_tovec##D##i(argv);                                                    \
         uint64_t hash = 0;                                                                         \
         for(int i = 0; i < D; i++)                                                                 \
-            hash = hash * 131071 + (uint32_t)v.data[i] * C;                                        \
+            hash = hash * 31 + (uint32_t)v.data[i] * C;                                            \
         py_newint(py_retval(), (py_i64)hash);                                                      \
         return true;                                                                               \
     }
diff --git a/src/public/py_dict.c b/src/public/py_dict.c
index 1a64600a..fe0c1bce 100644
--- a/src/public/py_dict.c
+++ b/src/public/py_dict.c
@@ -158,7 +158,7 @@ static bool Dict__set(Dict* self, py_TValue* key, py_TValue* val) {
         if(res == -1) return false;  // error
     }
     // no empty slot found
-    if(self->capacity >= self->entries.length * 8) {
+    if(self->capacity >= self->entries.length * 10) {
         return RuntimeError("dict has too much collision: %d/%d", self->entries.length, self->capacity);
     }
     Dict__rehash_2x(self);
diff --git a/tests/80_linalg.py b/tests/80_linalg.py
index cb9da505..3c38a47e 100644
--- a/tests/80_linalg.py
+++ b/tests/80_linalg.py
@@ -409,8 +409,7 @@ x, y, z = vec3(1.0, 2.0, 3.0)
 assert x == 1.0 and y == 2.0 and z == 3.0
 
 
-d = {}
-e = {}
-for i in range(10000):
-    d[vec2i(i, 0)] = i
-    e[vec3i(i, 0, 0)] = i
\ No newline at end of file
+d = {vec2i(12, 12): 1035.313708305359, vec2i(12, 11): 2059.313708305359, vec2i(12, 13): 2059.313708305359, vec2i(11, 12): 2059.313708305359, vec2i(13, 12): 2059.313708305359, vec2i(13, 11): 3083.313708305359, vec2i(13, 13): 3083.313708305359, vec2i(14, 12): 3083.313708305359, vec2i(12, 14): 3083.313708305359, vec2i(11, 13): 3083.313708305359, vec2i(12, 10): 3083.313708305359, vec2i(11, 11): 3083.313708305359, vec2i(10, 12): 3083.313708305359, vec2i(13, 14): 4107.313708305359, vec2i(14, 13): 4107.313708305359, vec2i(14, 11): 4107.313708305359, vec2i(15, 12): 4107.313708305359, vec2i(12, 15): 4107.313708305359, vec2i(11, 14): 4107.313708305359, vec2i(13, 10): 4107.313708305359, vec2i(10, 13): 4107.313708305359, vec2i(11, 10): 4107.313708305359, vec2i(10, 11): 4107.313708305359, vec2i(12, 9): 4107.313708305359, vec2i(9, 12): 4107.313708305359, vec2i(14, 14): 5131.313708305359, vec2i(15, 13): 5131.313708305359, vec2i(13, 15): 5131.313708305359, vec2i(15, 11): 5131.313708305359, vec2i(16, 12): 5131.313708305359, vec2i(12, 16): 5131.313708305359, vec2i(11, 15): 5131.313708305359, vec2i(14, 10): 5131.313708305359, vec2i(10, 14): 5131.313708305359, vec2i(13, 9): 5131.313708305359, vec2i(9, 13): 5131.313708305359}
+d[vec2i(11, 9)] = 1
+
+print(d)
\ No newline at end of file